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Introduction to PHP fflush() Function

The fflush() function in PHP is used to flush the output buffer of a file pointer. It's a crucial function for server administrators and web developers who want to manage their files and directories.

The fflush() function accepts one parameter, the file pointer you want to flush. In this article, we'll discuss the syntax and parameters of the fflush() function, along with examples of how to use it.


The syntax of the fflush() function is as follows:

bool fflush ( resource $stream )
  • stream: the file pointer to flush


The fflush() function takes one required parameter:

  1. $stream: The file pointer you want to flush. This parameter can be a resource created using the fopen() function or a similar function.


Here are some examples of how to use the fflush() function:

Example 1: Flush a file pointer

The following example flushes the file pointer $fileHandle:



Example 2: Flush multiple file pointers

The following example flushes multiple file pointers:




In conclusion, the fflush() function is a crucial PHP function that can be used to flush the output buffer of a file pointer. It's essential for managing your files and directories and ensuring that they're in the correct locations.

By using the examples provided in this article, you should now be able to use the fflush() function in your PHP code with ease. If you have any questions or concerns about using the fflush() function in PHP, feel free to reach out to us. We'd be happy to help you out.

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